Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/6572
Title: Large asymmetric hypertrophy of rectus abdominis muscle in professional tennis players
Authors: Sanchis-Moysi, Joaquin 
Idoate, Fernando
Dorado, Cecilia 
Alayon, Santiago
Calbet, Jose A L 
UNESCO Clasification: 241106 Fisiología del ejercicio
Keywords: Soccer
MRI
Muscle
Issue Date: 2010
Journal: PLoS ONE 
Abstract: PURPOSE: To determine the volume and degree of asymmetry of the musculus rectus abdominis (RA) in professional tennis players. METHODS: The volume of the RA was determined using magnetic resonance imaging (MRI) in 8 professional male tennis players and 6 non-active male control subjects. RESULTS: Tennis players had 58% greater RA volume than controls (P = 0.01), due to hypertrophy of both the dominant (34% greater volume, P = 0.02) and non-dominant (82% greater volume, P = 0.01) sides, after accounting for age, the length of the RA muscle and body mass index (BMI) as covariates. In tennis players, there was a marked asymmetry in the development of the RA, which volume was 35% greater in the non-dominant compared to the dominant side (P<0.001). In contrast, no side-to-side difference in RA volume was observed in the controls (P = 0.75). The degree of side-to-side asymmetry increased linearly from the first lumbar disc to the pubic symphysis (r = 0.97, P<0.001). CONCLUSIONS: Professional tennis is associated with marked hypertrophy of the musculus rectus abdominis, which achieves a volume that is 58% greater than in non-active controls. Rectus abdominis hypertrophy is more marked in the non-dominant than in the dominant side, particularly in the more distal regions. Our study supports the concept that humans can differentially recruit both rectus abdominis but also the upper and lower regions of each muscle. It remains to be determined if this disequilibrium raises the risk of injury.
URI: http://hdl.handle.net/10553/6572
ISSN: 1932-6203
DOI: 10.1371/journal.pone.0015858
Source: PLoS ONE [ISSN 1932-6203], v. 5 (e15858)
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